CAS 1207751-12-9 appears in our catalog under these names: Poly(oxy–1,2–ethanediyl), α–(2–aminoethyl)–ω–(2–((3–(2,5–dihydro–2,5–dioxo–1H–pyrrol–1–yl)–1–oxopropyl)amino)ethoxy)–, Mal-PEG-NH2 97% average Mw5000, Mal-PEG-NH2 97% average Mw2000, Mal-PEG-NH2 average Mw400 average Mw400. Offered by: GLPBio, Ambeed. Available pack sizes: 100mg, 1g, 250mg, 5g.